Upper-mantle seismic discontinuities and the thermal structure of subduction zones
Nature
By: J.E. Vidale and H.M. Benz
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Abstract
The precise depths at which seismic velocities change abruptly in the upper mantle are revealed by the analysis of data from hundreds of seismometers across the western United States. The boundary near 410km depth is locally elevated, that near 660 km depressed. The depths of these boundaries, which mark phase transitions, provide an in situ thermometer in subduction zones: the observed temperature contrasts require at least moderate thickening of the subducting slab near 660 km depth. In addition, a reflector near 210 km depth may mark the bottom of the aesthenosphere.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Upper-mantle seismic discontinuities and the thermal structure of subduction zones |
| Series title | Nature |
| DOI | 10.1038/356678a0 |
| Volume | 356 |
| Issue | 6371 |
| Year Published | 1992 |
| Language | English |
| Publisher | Springer Nature |
| Description | 6 p. |
| First page | 678 |
| Last page | 683 |
| Country | United States |
| State | California, Idaho, Nevada, Oregon, Utah, Washington, Wyoming |
| Other Geospatial | western United States |